Review: Glove Audio A1 DAC and headphone amplifier

Introducing Glove

The DAP (digital audio player) segment has exploded in the past two years. Innovation is driving rapid product progression. What you bought two years ago will not be obsolete, exactly, but it will be a far cry from state-of-the-art, and while odds-are that the new products will only have a few more features than their predecessors, those few new features could change the whole product in many ways!
Take Astell&Kern, for example. Their “classic” AK100 & AK120 DAPs hit the scene like a wild fire two years ago. It's an odd thing, referring to two year-old products as “classic”, but the company has already updated and expanded the entire product line in this time. Whoops.
I'm a big fan of the classic players. I own both, and paid for both. And now, here come the sexy new replacement players: the AK100II ($899, up from $699 for the older model) and AK120II ($1699, up from $1,299). They've also introduced their class-defining AK240 player, topping out at a whopping $2,499. And yes, having lived with the AK240, I can tell you it's worth it.
Bottom-line? The price for entry into Astell&Kern DAPs has gone up. This is what happens when innovation is accelerating. However, as much as I love the AK240 (and believe me, I love the AK240), the replacement players for the AK100 and AK120 only impress me when it comes to their sharp looks and feature set; I still prefer the sound of the original AK120 to the new replacement players. That being said … if I could improve the sonic performance of my classic AK120, I might not even need an AK240!
Enter Glove Audio, a new product and line from CEntrance, and the new A1 DAC/Amp for Astell&Kern AK100 and AK120 players.

I’ve been fortunate enough to live with this component for a couple of months now, and it’s never leaving my possession, or detaching from my AK120! The additional SD memory cards are purchased and installed. It’s all mine.

Backing up a step: the Astell&Kern AK240 arrived weeks before the Glove Audio A1 showed up, and I was already starting to conspire: “what components can I part with in order to purchase the AK240?” Alexandra, my poor wife, was already hearing excuses about why I needed to have this new DAP, how it sounded the best, how it’s positively the edge of the audio arts in DAPS. Of course, it would be my third A&K player … yeah, it’s a little gluttonous. Sometimes I get caught up in the gear end of things, more so in personal audio simply because the components are smaller – I can squeeze more units into my desk in the Sonic Satori Personal Audio Lab!

I still want an Astell&Kern AK240 – there’s no doubt about that. But, after living with the Glove Audio A1, I’m no longer in a rush to own one. I still feel the AK240 is the King of DAPs for many reasons, but based on musical/sonic playback, I’m just as excited about the Glove. Let’s do the math: the AK240 is $2,499, I already own an AK100 and an AK120, and the Glove Audio A1’s price is $599. Hmmm.

Now, usually I don’t compare products in my component reviews, unless the comparison is part of the story. Because so many products in the same category (such as DAPs) differ in design philosophy and execution, I feel it’s necessary to focus on the product I’m reviewing and judge it on its own merits. However, given the difference in price between the AK240 and the Glove Audio A1 (plus the cost of an original Astell&Kern player), I feel it’s necessary to spotlight a few things comparatively, especially because of the A1s’ exceptional sound performance.

The AK240 out-sexes the Glove Audio A1 in design and feature-set. With the AK240, you get the MQS streaming feature, which allows you to stream your entire digital music collection to the player via Wi-Fi, an exceptionally cool option that you don’t get with the Glove Audio A1.

The AK240 also has a smaller physical footprint that the Glove, when combined with the required AK100 or 120 player connected. However, the difference in size isn’t as great as you might think looking at the photos.

The battery-life of the Glove also out-shines the AK240 by hours; I believe the battery-life of the A1 is around ten hours and the 240 is around half that.

But in the end, I the fact that I get performance that’s on-par with Astell&Kern’s statement DAP in a product that’s $599 is a real testament to the Glove’s designer. It’s a wonderful thing when you can play with the big boys at a fraction of their cost, and you don’t have to sacrifice quality to get there. Rare. But wonderful.

Aside from their wonderful HiFi-M8 DAC/Amp – this is CEntrance’s lead designer Michael Goodman’s greatest sonic achievement and I felt that way the moment I fired-up the Glove unit for the very first time at T.H.E Headphonium during T.H.E Show Newport earlier this year.

Warren Chi, my friend and managing partner at Audio360.org, and I got a sneak-peek at the Glove before T.H.E. Show at Newport kicked off, and I was hooked after that brief audition. I bugged Michael for a review unit for the rest of the weekend, actually. He was a good sport about it, as always, but I bet I annoyed him a little bit. I couldn’t help it! That’s a mark of a great product. After I experienced it, I wanted more. I wanted to own one instantly!

Putting on your Glove

The Glove Audio does pretty much exactly what the name suggests. You take your AK100 or AK120, slot it into the enveloping glove of the Glove, and the Glove takes over the digital-to-analog conversion processes, arguably the most important stage in digital audio electronics, and the headphone amplification duties and soups em’ up if you will – it tricks em’ out. It’s like hot-rodding your car or your computer.

On the surface (literally), I’ve got my older player, the AK120. That’s the main interface. The player combo basically doubles in size. Now this sounds bigger than it actually is. Warren said, in reference to the relative sizes of the AK240 vs. the Glove Audio A1, “the idea is to get away from holding a brick” and he’s not wrong. But when you see the size of the Glove Audio A1 “DAP solution” it’s actually not much bigger than the Astell&Kern AK240! It’s deeper/taller, but its width and depth are very close. It feels stout, like a hand-held brick shithouse.

The look is stylish and modern with clean edges and no ninety-degree angles. The finish on this Glove unit is a cool matte black. It feels like an old school die-cast metal Walkman or Discman – it fits in my hands nicely. It feels like things used to be built. It feels like quality.

With the A1, you also get buttons. I know, you or your tween might say “ooooh, it’s got buttons?”, but I absolutely love them. There is a two-way volume button for up and down, and it clicks with each step. The gain steps are not far apart, which I like. This is pretty un-common these days for some reason: many products I have tried, the steps in the gain are far too big. I like to make minor gain adjustments during my listening sessions, especially when out and dealing with the world. Now, all it needs is a “mute” button.

At the ripe old age of 39, holding this thing in my hand and clicking the buttons is nostalgic for me. It takes me back to a time when I carried my bright-yellow “water-proof” Panasonic Discman everywhere I went. Nostalgic. That’s how I feel about the Glove Audio A1. Can it get any better than that?

Sound

Pardon me, but the A1’s got some balls. That’s as straight as I can put it. The power (SE: 150mw into 32Ω; balanced: 320mW into 32Ω) is more than I need, and I listen to a ton of experimental electronic music, which tends to suck up power. Don’t care what anybody thinks: electronic music can have the soul of acoustic music to me, if it hits me in the gut and the brain. Of course I love acoustic music too – especially singer/songwriter stuff, so my listening habits actually thrive on success at opposing ends of the frequency spectrum. The Glove handled it all with precision and grace.

In comparison to Astell&Kerns’ amazing AK240 DAP, via their balanced outputs, I found that the Glove had more power in its reserve than the 240. When playing something like Fhloston Paradigms’ Race to the Moon, a dynamic electronic roller coaster ride; the A1 kicked some serious ass with all the Audeze headphones I tried it with! Especially when running it balanced, the Glove just seemed like it had a more impressive gestalt in its overall stereo presentation. When I’m sitting at my desk working, listening to the A1, which I admittedly don’t do often here even if I’m doing it right now, as I type this, it sounds like a desktop amplifier; it has a sonic presence and detail much larger than its physical size and appearance might lead the listened to believe.

Of course, the AK240 also delivered a fantastic performance with all the same Audeze cans. My feeling is that it out-finessed the Glove Audio in the micro and macro-dynamic detail department, that the AK240 felt like it had greater detail retrieval throughout my listening sessions, if not by much.

The Glove’s got the muscle. The AK240 has the sharpened tools. After using both (yeah, sure, it’s been rough-going over here) for a while, I realized I could live happily with either one.

Highlights in use

Some sonic highlights using the Glove Audio A1 + AK120:

Audeze LCD-XC & Double Helix Molecule Elite 2.5mm balanced cables

Royksopp & Robin, “Monument”, from Do It Again (44.1kHz/16-bit FLAC): The breezy synths and pounding kick that encircled Robins’ sensual vocals was vast in soundstage width and depth, allowing her voice to soar out of this throbbing rhythm. It was sublimely executed. The effect of the ethereal sweeps and guitar strings, supporting the low-end thump after thump framing Robin’s strong, sexy voice was a wave of energy. This really showed off what the A1 can do in terms of stage depth and reproducing intricate, interwoven synth pads and keys. It’s a wash of warm-up music for the club…

Audeze LCD-X and Moon Audio Black Dragon 2.5mm balanced cables

Beacon, “Bring You Back”, from The Ways We Separate (44.1kHz/16-bit FLAC): One of my favorite tunes of 2014. Its rolling low-end is like calm thundering strikes off the ocean, rolling with a wavy rhythm.

The four-on-the-floor pulse driving that incredible bass just propels the motion forward, givin’ me a serious case of the head-nods. The airy vocals hover above the boom, and trail away into the soundstage. This sound is infectious.

Audeze LCD-XC & Double Helix Molecule Elite 2.5mm balanced cables

Shackleton, “I Am Animal”, from I Am Animal (44.1kHz/16-bit FLAC): Firstly: This is off one of a few Shackleton EPs I discovered recently. Most of them are collaborations. This one is from Shackleton and Appleblim. The sound is dark and tribal, minimal in composition, but huge in low-end thumps. This track slams, and this wavy, heavy, pounding bass line ebbs and flows as these percussive elements snap, and pop, hitting hard and echoing like the drums are being struck at the opening of a cave. The bass echo rings out like there’s all this dark space surrounding the track. This one’s also infectious, with a powerful draw to it. If I had this wax, I’d drop it in a DJ set at five A.M., as it’s the kinda track that’s mellow enough to play at sunrise, but it also slams, grabbing the attention. This is the sorta’ track that gets em’ outta their seats (and during this time – off the lounge chairs and couches in the club) and onto their feet – giving them rhythms that force people to move no matter how tired they are, or at least bobb their heads and shake their hips. This is the kind of track that, if I heard it in the club in the early-morning hours as I’m describing – I’d look over at my good friend Jim Welch (Judith Hill’s Manager – from 20 Feet From Stardom, the Grammy-Award winning documentary) and say “this is strong” with a grin as wide as I am capable!

Audio-Technica ATH-50x & Double Helix Cables Molecule Elite 3.5mm

Boards of Canada, “June 9th”, (44.1kHz/24-bit FLAC) from Skam: This track oozes electronic dance music. It kicks off with this dark, springy bass line that bounces while these acid stabs whip across the soundstage. Then these laser-like effects drop in and there’s an audible collage of electronic music elements – weaving in and out of each other, creating a soundspace that’s packed with different pings and pops and crackles – all happening in a space that feels like a planetarium, lit up for a star show. The atmosphere this track creates is cosmic and mystical. I love this one. It’s pure ear candy.

JH Audio Roxannes CIEMs (custom in-ear-monitors)

Cat Power “Free” (44.1kHz/24-bit FLAC) off You Are Free: This is a drivy, minimal acoustic song. Cat Power’s coarse guitar strikes and toe-tapping energy are wonderfully engaging and moving. The chorus, with Cat Power singing “everybody, come together – free” in a cadence that’s like a call to action, is the kind of hooky acoustic singer/songwriter pop that you wanna scream in the shower. I love this song. The A1 and JH Audio combination capture the essence of this little number. Cat Power is the voice of our generation and strikes me right in the gut. I can picture her at political rallies, gatherings for a cause. She’d have me standing and pumping my fist! The A1 did a splendid job of translating her power (no pun intended) and every-time I hear this record on a resolute system I think about all my dear friends and family, and the good times we’ve had. It’s the kinda song you play on a sunny afternoon after you got all your work done and you can reflect a bit.

BeatsByDre Solo2s

Thom Yorke’s “Black Swan” (44.1kHz/24-bit FLAC) off The Eraser: This is Yorke’s solo effort, and an LP that never leaves my DJ bag (the vinyl). It’s also on every DAP I own. It’s one of my all-time favorite acid-test tracks. The kick-drum slams and its fast-moving while the other percussive elements click, snap and float around the soundstage with this velocity that makes em’ feel like they’re drifting toward me and falling back away again. It’s sonically seductive –- the sway of the track –- with Yorke’s vocals hovering dead-center, while other synth-driven sounds fill in the soundstage. This is ear candy for the discriminating. It’s dark and velvety and I can’t get enough. I probably hit repeat every other time I played it on the A1 using my BeatsByDre Solo2, the only Beats headphones I can recommend –- thanks to Tyll Herstens and HiFiguy528 for opening my eyes to this particular pair.

Summary

The A1 has continued to impress me during the past few weeks. It reproduces stereo sound in an engaging and additive way; with the right cables and cans, I find myself reflecting on how far we’ve come in portable fidelity in the last two years alone. I never used to consider sound-staging when it came to headphone listening –- but thanks to the technology, material science and some insanely innovative companies, there have been huge strides in sound-staging and imaging capabilities in the last two years. Good times.

From the Mission district in San Francisco to the beach in Bethany Dunes on the Delaware shore, to back home in beautiful Sonoma County, California, the A1 sounded saucy no matter what I threw at it. I’ve cranked this thing in the morning when I’m half-conscious, shaving (yeah, its not the best idea) it sounds great then too, and I’m no morning person.

So, I’m keeping the damn thing. Whenever a product grabs me like this I always say the fact that I’m keeping it and making it a permanent fixture in the Sonic Satori personal audio arsenal. I think this is a better indication of satisfaction than flowery prose can ever achieve! In a world where we can have a bunch of high resolution digital audio on our portable devices, the Glove Audio (by CEntrance) A1 DAC/Amp for Astell&Kern’s now “vintage” AK100 & AK120 can get you to the very edge of the portable audio arts for $599 bucks on top of that prior investment.

The Glove Audio A1 is one of my favorite products of 2014. I listen to it every-day. How’s that for a glowing recommendation?

About the Author

Michael Mercer is an Audio Evangelist, and a reviewer of music and audio components. He got his start at The Absolute Sound in 1994.After his tenure there, he joined Atlantic Records where, under the tutelage of legendary Grammy award-winning producer Arif Mardin, he worked with multi-platinum selling artists Jewel, Sugar Ray, The Corrs, Chaka Khan, Bette Midler and others.

In his career as a music writer and audio reviewer, Michael has contributed to industry bibles such as The Absolute Sound and HiFi+. He is currently a managing partner at Audio360.org and writes for Part-Time Audiophile, Positive Feedback, The Daily Swarm, The High Fidelity Report, Big Black Disc, Headphone.Guru and Enjoy the Music where his “Sonic Satori” column is featured.

Financial Interests: Michael is a long-time industry veteran with many past engagements with audio companies, including VFX, CEntrance, HRT, Elite AV, Soundscape and some work in the music industry. He does social media engineering for headphone-related showcases at various regional audio shows and Head-Fi meets, including the Rocky Mountain Audio Fest, CanJam @ RMAF, T.H.E. Show at Newport Beach, and more on the way. He is also a brand-building and social media consultant for leading media outlets Positive Feedback and The Daily Swarm. Past engagements have promoted various Hi-Fi brands, including Audioengine and Nordost.

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21 Comments on Review: Glove Audio A1 DAC and headphone amplifier

Mike, I’m currently using a Pico Power amp with my AK100 (I know the Glove is a DAC, too) and am wondering if the DAC part is enough to justify the investment. Not exactly comparing apples to apples, but would appreciate your opinion.

Great review, for driving something like HD800, would you say that this or the new AK100ii or AK120ii is the better choice? I currently use an ipod classic with an ALO RxMk3b but want a better source, and the streaming system of the new AK’s is very tempting but if they cant run the HD800, Audezes, and other fullsizers properly compared to something like the Rx Mk3b then it would be a pointless upgrade for me, as I don’t really enjoy IEMs 😛

I love/loved my AK120 too – but it ALWAYS needed more juice for me, as I LOVE headroom, dynamic and gain. I was seeking a way to enhance it along these lines WITHOUT killing it’s sonic integrity – no joke, and then – Michael Goodman delivers again!

I have spent time w/ the Chord Hugo – and its a fantastic DAC and portable DAC/headphone amp – tons of features.
For me – as I’ve been lucky enough to hear the Hugo + the AK240 together – I’d say that since the 240 and the Hugo are different products altogether – its really tough, and perhaps a BIT unfair – but I will say this:

The AK240 – running Balanced, driving killer low impedance cans like Audeze LCD-2, 3, or Sennheiser HD800 – is magical.
I think, in terms of its headphone amp and DAC section – the Hugo might have more bloom on the top end and bottom – as it SHOULD! Because those are the Hugo’s primary functions. The AK240 has to be a great DAP, DAC, and headphone amp!

So I think they make GREAT partners and are on-par with each other – with the Hugo etching it out in overall detail retrieval and dynamic gestalt.

As for the A1 – for me, personally, the A1 is the readon I haven’t purchased a Chord Hugo!
Or, I should say, more accurately, that owning the CEntrance HiFi-M8 and Glove Audio A1 are why I don’t feel like I need to buy the Hugo! But if I didn’t have the HiFi-M8 – I’d give it deeper consideration.

I don’t think you can go wrong w/ the Glove Audio A1 for your AK120 – AND as we ALL hear and interpret differently:
If it doesn’t strike you like it does me – send it back within the 30-day period and try the Hugo!!

But I say, and I feel very comfortable recommending this: Go for the Glove Audio A1 when you can (2 months I believe).

Big thanks to Michael Mercer who brings genuine interest and total audiophile passion to all of his reviews. We are all better off with an advocate like that working hard to put our small industry on the map!

Any questions about A1 – email info at CEntrance dot com. We will reply right away, or hit is up at Facebook.

I just heard back from Michael Goodman at CEntrance – they went with a Sabre DAC chip this time – the ES9018 that John posted above! That’s certainly one of the reasons I’m enjoying the unit so much (but its not just a chip, as Goodman himself would say – its the implementation). But I enjoy my Oppo BDP-105 and other components here that utilize Sabre DAC chips – so there must be something about it that I enjoy!

It’s FAR from nonsense if you already own an AK120 (as I do) and you want to turn it into a DAP solution that rivals the sonic playback of the AK240 for $599!

There are many users out there who love their AK120s and AK100s that cannot afford an AK240 – and, in our comparisons of all the A&K players (we did the most in-depth comparisons of ALL the players – new and old, at Head-Fi.org) we found that we liked the original AK-120 better than the the new AK100II and AK220II!

So, this is a way to turn your original A&K DAP into a state-of-the-art performing DAP today! Astell&Kern also welcome the product.

Besides, are there actually used AK240s available? They’re so new (we did the very first review of the unit at Audio360.org)!

I’m sure there are more used AK120 players available than used AK240 players for sale!
So why list the retail price of the AK120 + Glove – but then mention getting a “used” AK240?

Living with BOTH units – I also think it’s far from nonsense to acknowledge CEntrance for such a terrific component at a reasonable price. They did the market research and know how many AK120 and AK100s are out there. This was NOT built for people to go out and buy an AK120/100 AND a Glove Audio A1 (though you may do that).

It was built for AK120 and AK100 owners!
I have a feeling many of those users will be psyched about the Glove Audio A1.
Plus: It’s nice to have 10 hours of playing time! If you play all hi-rez files, the AK240 barely lasts 5 hours (hopefully they’ll improve that soon). I couldn’t get from CA to NY by plane when I used my AK240. When using the Glove – it lasted there AND back!

hey Fred!
I didn’t have any specs when I wrote this sneak-peak review – if you will.
SO glad you want one: You won’t be disappointed!! The answer with regard to IEMS is: Absolutely! I used my JH Audio Roxannes w/ my AK120 alone plenty of times, and then w/ the Glove Audio A1 + AK120.

I found that, w/ the Glove – there was a much more immediate-ness to the sound: Greater velocity, greater transient attack, etc. There was more gestalt. I’d HIGHLY recommend the Glove to anybody using IEMs!

I’m SO glad you want one! You won’t be disappointed!! I love this product – as indicated in the review. I’m listening to it right now!!

I’m not sure of the chipset yet – I didn’t have any specs at the time of the review.
BUT: I will post them here for you once I get that intel!

In the meantime – the Glove made a HUGE sonic impact on my IEM experience (in my case, my CIEMs – the JH Audio Roxannes) w/ my AK120! Now – I’ve traveled the country with my AK120 before I did the same with my Glove Audio A1 + AK120!! So I knew the performance well prior to the A1.

Adding the Glove, when using my JH Audio Roxannes, brought about far greater dynamics , micro and macro-dynamic detail. The whole stereo presentation got “larger”. The soundstage had greater width and depth. The frequency spectrum seemed to get a boost across the board – without anything sounding artificially EQ’d.

I just s/w Michael Goodman from CEntrance and they chose to use a Sabre ES9018 DAC chip that John Darko posted above.

That actually makes sense to me, as I wrote above in my comment: I have a few components at home that utilize the Sabre DAC chips so there’s something about em that I like! However, all of my engineer/designer buddies tell me its never the DAC chip alone – its the implementation! But there ya go!